105 lines
3.4 KiB
C
105 lines
3.4 KiB
C
/*
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* CDE - Common Desktop Environment
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*
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* Copyright (c) 1993-2012, The Open Group. All rights reserved.
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*
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* These libraries and programs are free software; you can
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* redistribute them and/or modify them under the terms of the GNU
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* Lesser General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* These libraries and programs are distributed in the hope that
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* they will be useful, but WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU Lesser General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with these libraries and programs; if not, write
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* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
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* Floor, Boston, MA 02110-1301 USA
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*/
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/* $XConsortium: PixmapCycler.C /main/3 1996/04/21 19:40:27 drk $ */
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/*
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*+SNOTICE
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*
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* RESTRICTED CONFIDENTIAL INFORMATION:
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*
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* The information in this document is subject to special
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* restrictions in a confidential disclosure agreement bertween
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* HP, IBM, Sun, USL, SCO and Univel. Do not distribute this
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* document outside HP, IBM, Sun, USL, SCO, or Univel wihtout
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* Sun's specific written approval. This documment and all copies
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* and derivative works thereof must be returned or destroyed at
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* Sun's request.
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*
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* Copyright 1993 Sun Microsystems, Inc. All rights reserved.
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*
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*+ENOTICE
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*/
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///////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////
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// This example code is from the book:
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//
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// Object-Oriented Programming with C++ and OSF/Motif
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// by
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// Douglas Young
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// Prentice Hall, 1992
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// ISBN 0-13-630252-1
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//
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// Copyright 1991 by Prentice Hall
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// All Rights Reserved
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//
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// Permission to use, copy, modify, and distribute this software for
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// any purpose except publication and without fee is hereby granted, provided
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// that the above copyright notice appear in all copies of the software.
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///////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////
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// PixmapCycler.C: Abstract class that supports a continuous cycle
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// of pixmaps for short animation sequences.
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////////////////////////////////////////////////////////////////////
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#include "PixmapCycler.h"
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#define INVALID -1
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PixmapCycler::PixmapCycler ( int numPixmaps, Dimension w, Dimension h )
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{
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_numPixmaps = numPixmaps;
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_current = INVALID;
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_pixmapList = new Pixmap[_numPixmaps];
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_width = w;
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_height = h;
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}
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PixmapCycler::~PixmapCycler()
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{
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delete []_pixmapList;
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}
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Pixmap PixmapCycler::next()
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{
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// The first time, call the createPixmaps() function
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// implemented by the derived class to create the pixmaps
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if ( _current == INVALID )
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{
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createPixmaps();
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_current = 0; // Initialize to the first pixmap
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}
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// If the counter is larger than the index of the
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// last pixmap, roll it over and restart with zero
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if ( _current >= _numPixmaps )
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_current = 0;
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// Return the current pixmap and increment the counter
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return _pixmapList[_current++];
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}
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